Air valve



mental .im 41o. 1930 PATE-NT ol-Ar-"icr:A

o'r'ro ADAM amos, oFcnIcAoo, yrLm-:NoIs

'am VALVE Applicatie@meaj'rebfuary as, 192e. serial No. sans. y

I i general object to provide an improved. construction ofl means by -which to preventythe entrance of air through the air valve and thereby to` effect an increase in the extent of the vacuum produced by the condensation o steam when the system cools. A further object of my invention' is to provide a simple construction in the form of cap for the well known ty es of air valves employed in connection with steam radiators. A .still further object of my invention'is to rovide a construction ,of this character which will be inexpensive e'asy to apply and highly ellicient in use.

O her objects will appear hereinafter. The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

Theinvention will'be reference to theaccompanying drawing forming a party of this speci which, i

Fig. 1 represents an elevational view of a steam radiator equipped with an air valve carrying my im roved attachment; v

Fig. 2 is a part1al elevational view and sec# tion', the section being taken through my attachment and substantiall 2-2of Fig. 1; the section t rough the atopening position;

. Fig.'3 represents a central section through my attachment showing the means for securing thecap closure-thereto and also showing the valve' member as it 'appears whensealing 40. the airway through the seat' Fig. 4 is atop plan view of the vcap vclosure removed; 4

Fig. 5 is an underneath plan view of the cap closure; and,

the device with Referring to the parts illustrated'in the drawing, 7 designates a radiator'of the type v.commonly employed in steam heatingdwellings and buildings; and8` designates a'we 5 known type' of air valve for the radiator.. s

n attachment or to manufacture,

best understood by y cation, and 1n' member in mately overlie the'flat surface ofthe seat 14 lon the linev tahment showing the valve member in through the airway Fig.. 6 is a plan view of the valvemember;`

ll the pocket As illustrated in the accompanying drawing, the preferred' form of construction of my invention comprises van attachment` w ich is adapted to be screw threadedu on' the stem 9 i'n place of the usual cap thereor. 55' The attachment includes a cylindrical stem orpneck portion 10 in which is provided a central threaded opening 11 for cooperation f with the threaded stem .9 as shown. A conical pock'et 12 is provided at the/,upper or top end of the threaded opening and an airway 13 extends from thev apeir, of this pocket through a raised circular seat 14 which isV formed at the top end of the body member 10. Surrounding the body member just below the" raised Seat 14 is an annular iange 15 upon which is adapted to rest the flangedrim 16 'of the cap closure 17 which i's adapted to form a chamber 18 abovethe raised seat. 'As'clearly shown in the drawing, the rimflange 16 surrounds the raised seat 14 in spaced relation'so as to' provide a recess 19 therearound, which recess is in communica'- tion with the chamber 18. l -Arranged in the chamber 18' is a valve the form of a vdisk-shaped element 20 which is `preferably "made of mica for other similar substance suitable for the purpose. The element 20 is adapted to mtiso as to seal the airway lvagainst the entrance'of air into the pocket 12 and hence into the valve J8 when, under this arrangef ment, a vacuum is produced inthe steam' heating systemb'y reason of the condensa- Y. cools, a drawing or suction actionv is produced through the air \valve 8 and hence 13 to' draw the valve member 20 tightly upon the seat 14 so as to seal the airway 13 against? the entrance into the system of'an'y outside air which may be recess 19- through the 4,mi

side atmosphere. When, after being cooled, the system is again heated up, the air expelled through the air valve '8 and hence througlh 12 and airway 13 will force't-e valve member 20 'from its' seat s0 4aS to es- JM tionof the steam therein. When the steam cape underneathI the valve member into the Said stem being adapted for attachment to4 recess 19 and thence through the way 21 to the outside atmosphere. In this connection it is to be noted thatthe cap closure 17 is provided with a conical underneath pocket 22 which is designed to serve as an air trap `for cushioning the valve member 20 so that the valve member cannot possibly stick to the cap closure because of moisture 'or any foreign matter that may have been. passed i' through the system and air valve into the chamber 18. Owing to the provision of the raised seat 14, the recess 19`surrounding the same and the descending way 21, any water or foreign matter issuing through the airway 13 Will be promply passed to the outside of the body member, so that the top of the' seat 14 is kept clean at all times under the expulsion of air for the intimate engagementof the valve member with the seat.

lVhile I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited' to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come Within the scope of the appended claims.

Having described my invention, what I claim as new and desire to 'secure by Letters Patent is:

1. A valve attachment of the type described, comprising a body member having stem and a head portion above said stem,

a radiator valve and having a chamber below l said head portion communicable with 'the air-vent of the radiator valve, said body having an axial airway, relatively smaller than said chamber, extendingJ through the top of said head, a raised, flat-surfaced, circular seat formed on said head and surrounding said airway','a valve element comprising a disc of the character of sheet mica, nor- .mally supported loosely on said seat and covering said airway, an outlet airway through said head `exterirly of sad-raised seat, a cap member shaped to form topped chamber above and ound saidseat,

'said cap member having a flat rim adapted to rest on the upper surface of said head in ,'spacedurelat-ion to the-peripheralface of saida raised seat, and its central portion bemg conj c'avcd above said seat, and means for det-ach- ,L'fably securing said head portion and cap member together, substantially as described.

2; In combination with a' 'radiator relief` 60 -,valve havig a vent opening, of a cap member lfor "said opening, said cap member havlng' a. lower chamber communicating with said opening-and an upper chamber having rfiat-;t' a,ced)bottom wall provided with a re- .;.j .strited central aperture affording commua relatively lownication between said upper and lower chambers, said upper chamber having a relatively low concaved top wall, and a loose valve element, comprising a relatively thin disc lof 'A of the characi tachment being providedwith a chamber in its upper portion,'said chamber having a raised, fiat-faced, circular seat at its bottom through which the restricted airway opens centrally into said chamber, said lchamber being relatively low-topped and having-"an outlet airway outside the periphery of said raised seat, and a loose valve element nor-'A mally supported on said raised seat and covering said first mentioned airway, said valve element comprising a disc of sheet material of the character of mica and being substantially the same in diameter as said raised seat.

4. An attachment of the character described, having a relatively low-topped chamber, said chamber having a flat-faced bottom portion and the top of said chamber above said bottom ortion being recessed dome-like, and there being al central restricted opening in said bottom portion, said opening being communicable with the air-vent of the radiator valve when the device is applied, said chamber having an outlet opening outside of said flat-faced bottom portion, and

a valve element comprising a disc of sheet material of the character of mica, normally supported loosely on said flat-faced bottom portion of said chamber and covering said restricted opening therein. 2

In testimony whereof I have signed my name tothis specification. Jf OTTO ADAM AMOS.` 

